Throughout the ages, knowledge has always been commercialized. We pay a cobbler for his knowledge on how to repair a shoe; an electrician makes a living by trading his expertise on how to fix electrical appliances and so on. Human race as a unit is full of knowledge and yet we accomplish little with it. This is changing with the emergence of online knowledge marketplaces. These knowledge markets provide a mechanism for distributing knowledge resources. Some of the popular ones are Quora, Answers, StackOverflow. They provide a place where people can post their queries; which gets resolved by a community of knowledgeable and experienced regular users. Questions and answers together with a capable search engine enables a community member to be a knowledge-giver or a knowledge-seeker. This phenomenon of shared intelligence that emerges from the collaboration is called collective intelligence. Peer Tell, an android based mobile application that provides a platform to bring students together based on a field of study to discuss their issues/findings and suggestions on various topics. This thesis is based on research on information discovery, knowledge market and how Q&A Expert Systems are built. The application includes all broad categories of subjects taught in the Computer Science Department. Students and faculties of the department can respond to the questions posted by peers. All discussions are tagged appropriately to help in future topic searches. Therefore, the app serves as a common floor for the students where all their discussions can take place.